I don't have the 805 but maybe I can help some.
Were you running your PS3 & Sat with HDMI on your old system?
If not you may need to go into the setup menus of those & change some settings to make sure you are sending the correct audio format through HDMI.

The Onkyo's do run hot, you may want to find a spot with more air space around it & get a fan for it.